Bay Area HVAC Service
(925) 999-4095 · Calls answered any hour · Business hours 7AM – 7PM · 7 days · No overtime · CSLB #1136642 · BBB A+
Serving the Bay Area
Bay Area HVAC Service
(925) 999-4095 Book service

South San Francisco · CSLB #1136642 · family-owned

Mitsubishi HVAC in South San Francisco

South San Francisco built its name on industry and now runs on biotech, and the Mitsubishi work here splits the same way: older residential tracts on one side, converted office and lab space on the other.

(925) 999-4095 → Book service

$99 repair diagnostic, credited toward the repair · Free installation assessment

Mitsubishi in South San Francisco

Mitsubishi Electric Diamond Contractor since October 2026. We install Mitsubishi Electric ductless systems and continue to repair and service other mini-split brands.

As a Mitsubishi Electric Diamond Contractor, we register your M-Series or P-Series system for the Mitsubishi Electric 12-year parts and 12-year compressor limited warranty (the HM, WR, HX and WX wall-mounted series top out at 10 years). We register all indoor and outdoor units within 90 days of installation. This coverage applies to a single-family home while the original owner continues to live there and is not transferable. Our standard workmanship warranty is 2 years.

Optional extended labor coverage through JB Warranties is available for up to 12 years under a separate purchased plan. It is not included automatically with the manufacturer warranty.

Financing available on approved credit.

What our Diamond Contractor status means for your home →

Mitsubishi ductless questions: cost per room, noise, the free assessment →

How the 5, 10 and 12-year Mitsubishi warranty levels work →

Mitsubishi options for your home

Start with the space you want to heat and cool, or compare equipment layouts.

South San Francisco carries two identities that show up in the work. The residential neighborhoods, Winston Manor, Serra Highlands, Sunshine Gardens, are the same era of small post-war houses you find across the North Peninsula, many without ducts and running old wall or floor furnaces. The other side of the city is the biotech corridor along Oyster Point and East Grand, where warehouse and light-industrial buildings have been carved up into offices and lab space that never had central HVAC designed in.

Those two situations call for the same brand for different reasons. In the older houses, a Mitsubishi single or multi-zone system adds real heating and cooling without cutting ducts into 1950s framing. In the converted commercial buildings, a multi-zone Mitsubishi lets a landlord or tenant condition a suite room by room instead of running one oversized rooftop unit for a floor plan that keeps changing as leases turn over. We also route through Brisbane, right on South San Francisco's edge, on the same trip.

We're ADRIUM Service Solutions, an owner-operated shop out of San Ramon, CSLB #1136642 and EPA Section 608 Universal certified for the refrigerant work. Diagnostics are $99, credited toward the repair, and you get a written quote before anything starts. We run seven days a week. Call (925) 999-4095.

Mitsubishi work we do in South San Francisco

Multi-zone installs in converted office and lab suites. Warehouse and light-industrial buildings along Oyster Point and East Grand get subdivided into offices and lab space as tenants turn over, and the original HVAC design doesn't keep up. A multi-zone Mitsubishi system, one outdoor condenser feeding several ceiling or wall heads, lets each room hold its own setpoint without touching the building's core mechanical.

No-duct retrofits in Winston Manor and Serra Highlands. These post-war tracts share the same story as the rest of the North Peninsula: small houses, no ductwork, original wall or floor furnaces still running. We fit single or multi-zone Mitsubishi systems to add cooling and modern heating without breaking into plaster or framing that was never built to carry ducts.

Refrigerant leak repair on flare joints. On existing Mitsubishi systems, a slow capacity loss over a season usually traces to a flare fitting that wasn't torqued right at the original install. We pressure-test with nitrogen to find it, remake the flare, then evacuate the line set and weigh in the correct charge rather than just topping it off.

Factory-trained on Mitsubishi

A Mitsubishi City Multi copper refrigerant manifold, from our Advanced M- and P-Series factory service training.
Mitsubishi M- and P-Series service training in progress on a ceiling cassette at the Los Angeles factory training center

Mitsubishi in South San Francisco: common questions

Do you come out to South San Francisco, or is that too far from San Ramon?
We do, and it's easier than it used to be. We now have a technician who lives on the Peninsula, in San Mateo County, and South San Francisco sits in his regular territory alongside San Bruno, Daly City, and Brisbane, instead of a drive across the whole Bay. Call (925) 999-4095 and we'll get you scheduled.

Can you condition a single office suite without touching the rest of the building?
That's the usual case in the biotech corridor. A multi-zone Mitsubishi system serves individual rooms or suites off one outdoor condenser, so you're not asking a building-wide rooftop unit to handle a floor plan that changes every time a lease turns over. We scope condenser and line placement on site.

Can you schedule around business hours for an office or lab suite?
Yes. Commercial tenants usually want the work done outside business hours or over a weekend, and we run seven days a week, so that's rarely a scheduling problem. We coordinate access with building management ahead of the visit.

What warranty comes with a Mitsubishi Electric installation?
As a Mitsubishi Electric Diamond Contractor, we register your M-Series or P-Series system for the Mitsubishi Electric 12-year parts and 12-year compressor limited warranty (the HM, WR, HX and WX wall-mounted series top out at 10 years). We register all indoor and outdoor units within 90 days of installation. This coverage applies to a single-family home while the original owner continues to live there and is not transferable. Our standard workmanship warranty is 2 years. Optional extended labor coverage through JB Warranties is available for up to 12 years under a separate purchased plan. It is not included automatically with the manufacturer warranty.

Nearby and related

Mitsubishi near South San Francisco: San Bruno · Daly City · Millbrae .

Other brands we service in South San Francisco: Ameristar · Bosch · Comfort-Aire · Friedrich · LG · Maytag · MRCOOL · Samsung · Amana · American Standard · Bryant · Carrier · Coleman · Cooper & Hunter · Daikin · Ducane · Fujitsu · Goodman · Gree · Heil · Lennox · Payne · Rheem · Ruud · Tempstar · Trane · York .

See the Mitsubishi overview, our HVAC installation in South San Francisco, or the South San Francisco service area.

Mitsubishi in South San Francisco

Repairs start with a $99 diagnostic, credited toward the fix. Replacing a system? The on-site assessment visit is free. Same-day written findings either way.

Bay Area · 7am–7pm · 7 days · no overtime charges

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